Bag-making machine



L. H. AND C. H. HARTMAN.

BAG MAKING MACHLNE.

APPLICATION man MAR. 15. |920.

SHEET 3 SHEETS- INVE'N'T'R L. H. AND C. H. HARTMAN.

BAG MAKING lMACHINE. APPLICATION man MAR. 1s, 14920.

0. 2. 92 1n 0mm .1s S ...um ,Um s d3 m .w D...

Pfg 4.

INVENTUR APFLIcATIN FILED MMI. I5. 1920.

Patented Oct. 19,` 1920.

PATENT OFFICE.

LOUIS H. HARTMAN, OF TOLEDO, AND CARL H. HARTMAN, OF WOODVILLE, OHIO, ASSIGNORS TO'TI-IE VALVE BAG COMPANY, OF'TOLEDO, OHIO, A CORPORATION l or ome.

Specification of Letters Patent.

:BAG-MAKING MACHINE.

Patented Oct. 19, 1920.v

Application filed March 15, 1920. Serial No. 365,727.

do hereby declare the following to be a full,

clear, and eXact description of the' invention, such asl will enable others skilled in the art to which it appertains to make 'and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

Our inventlon relates to a means for dil recting the/ends of opposite sides of a tubular member so that the end of the tubular member may be properly folded. `In bag making machinery of a type well known in the art, means is provided for making bags from paper fed continuously from ,a roll wherein the edges of the paper are turned under a form and secured together by a cementitious material to form a tube of paper having a size the same as that of the bags and from which portions are cut transversely to make the bags of-suitable length. The machines havea means for folding they end of the tubular member to form one o r both ends of the bags, a severing or cutting means and a feeding means to feed the tubular paper body beneath the severing or cutting means. In the particular form of the machine to which the invention pertains, a means is provided for folding the forward end of the pa er tube to form the bottom of each bag. y our invention is provided a means that operates through the tubular member, the feeding 'rolls Vand in the vicinity of. the folding means for properly directing opposite side edges of the forward ends of the paper tube so that the said opposite side edges will be engaged to produce proper folding and prevent the end of the tube or the ends of the bags from being crumpled up in the folding Operation. Inasmuch as the tubular member is formedby uniting side-edges of the sheet material, namely, the paper, with'a moist cementitious material, any im lement placed within the tubular mem er that would cause it to bulge while the edges are being held by the cementitious material while still moist, will cause a deformity in the tubular member and consequently a de formity inthe bags formed therefrom. By

.our invention the side edges of the leading. end of the tube are guided without drawing the sheet material of which the bags are formed, particularly without. drawing the bodyportion of the tube or the bags, an-d when the edges are separated intheir guiding operations, this separation is performed only under conditions that will not cause deformation.

Other features and advantages of our inl vention will appear in the following description and upon the examination of the accompanying drawings.

Our invention may be contained in structures ofdiiferent forms. To illustrate a practical application -of our invention we have selected a construction containing or embodying the invention and will describe it hereinafter. The particular construction selected .is illustrated inthe accompanying drawings.

Figure l is a partially broken side view of a bag making machine containingtlie invention. Fig. 2 is a sectional view of the means forguiding the edges of the paper with reference to the folding means. Fig. 3 is a top view of a part of the device illustrated in Fig. 2. Fig. t is a sectional 'view .taken on the line 4,-4 indicated in operating Fig. l and shows the means of the part illustrated in Fig. 2. Fig. 5 is a sectional view. taken on the line 5 5 indicated in Fig. l. Fig. 6 illustrates the means for severing the parts that form the bag from the tubular'member. Figs. 7j and 8 illustrate the operation of the device for guiding the edges of opposite sides of the -portion to be formed into a bag preparatory to the folding operation of the forwardend of the saidl portion that has beenor is about to be severed by the cutting means-illustrated in Fig. 6. Fig. 9 illustrates the partsI of the machine that fold the ends of the tube or ends of severed portions that form the bag,tlie side .edges of the bag having been .guided by the said guiding means and withdrawn to prevent interference with the fold* ing means'. ig. l0 illustrates diagrammati cally the folding operation to which the pa- -per is subjected, and indicates the extent to which theisaid guiding means is withdrawn to prevent interference with the folddriving connections between the parts is' not shown it being understood that the parts v aref timed by suitable gearing or-*belt's in '2o. l. Means is provided for feeding a cementiorder that the parts ma'y properly perform their operations relative to each other. 2 is yav form over which the sheet material 'is drawn and guided and about which the sides of the .sheet material are bent to form a tubular member which is being fed into other parts of the machine. The form 2 is .supported at ythe rear end of the machine and so that the form 2 will extend into'the tubular member. The rear end of the form is secured to the bracket 3 which is suitably bolted to the frame l of the machine.

tious material to one of the edges of the paper so -that when the sides of thepaper are turned underthe form 2 andthe edges come in contact one above the other and are pressed by suitable rollers, such as the rollers 4, the edges of the paper will be secured 4which the form 2 extends.

The form 2 on the under side thereof is provided with a channel 5 in which is locted a rod 6. The rod 6 is pivotally contogether to form the tube of paper into nected to asliding block v7 that is guided bythe channel 5. The rod 6 is pivotally secured in the block 7- by means .of suitable nuts 8. The rod 6 and consequently the block 7 is also ided in its movements by the block 9 whic -is secured by suitable bolts in the channelA 5. The rod 6 isprovided with a slot 10. 'The slot 10 has abend, as at 11, so as to cause the slot to extend 90o around the rod 6, for the purpose of causing the rod 6 to turn on its axis in the' block an angle of 90 as and for the purpose hereinafter described. To coact with the slot 10 to'produce the turning movement of the rod 6, the block 9 is provided with a pin 12 that extends into the slot 10.v The pin 12 is locked in position by means of the nut 13 to securely hold the pin 12 in its adjusted position and to prevent binding on the rod 6. Reciprocatory movements of the vrod 6 in the block .9 will cause the rod 6 to rotate when the portion 11 of the slot 10 reaches the pin 12. f

A rod 14 is adjustably connected to the end of the rod 6, the rod 14 being threaded into the end of the rod 6. Itis secured in its adjusted position with reference to the rod 6 by means of the nut 15. The form 2 has an extension 16 which is bolted to the end of the form 2. The extension of the form 2 is bored centrally to form a bearing for the rod 14. The end of the rod 14 is provided with a flattenedportion 17. This may raised.

be formed by bending the end of the rod 14 back. This leaves one side of the portion 17 in line with the side of the rod while the other side of the portion 17 is inclined away from the body portion of the rod. The slot 10. 'is' so formed that the rod isheld normally soithat the flat portion 17 liesin a horizontal plane and until the portion 11 of the slot 10 passes along the inner Vend of the'pin 12 whereupon the rod 14 is rotated so as to cause the flattened portion to stand its edge. The -flattened portion 17 rolls on the side of the' flattened portion which is in line with the body7 portion of the rod thus causing the inclined edge of the flattened portion 17 to be turned upward when the end of the pin 12, is in the following end ofthe slot 10. 1

The lreciproca-tory movement ofthe rods i 6 and. 14 is v'accomplished by meansv of the arm 18 whichv is connected by a link 19 'to the block 7 The arm 18 may be operated by any suitable'means. In the construction located a roller 26 that causes the rod 2,0

to reciprocate vertically and thus swing the arm 18. n' f r The movements ofthe rod 14 is timed with reference to the operations of the cutter bar 27 which severs 'iportionsl ofthe tubular member formed on the'fform 2. The rod 14v follows the cutter bar 2,7v immediately after its operation to cut thep'aper and thus it follows very closely ther forward edge of the tubular member as it advances through r the machine. The rod thus passes -lbeneath the cutter bar while. the cutterbar is being The cutter bar is connected to a pair of pins 28 located in disks 29 connected to or forming a part of a shaft-30 which may be operated in any suitable manner-to cause rotation of the-cutter bar butin unison with movements of the rod 14 whichjis operated by the arm 18. In the form of structure shown the cutter bar 27 is rotated by a gearing operatedby the sh-aft`24 toY which thel rod 14 is connected through mechanism heretofore described. rhe disks 29 are provided with pivoted arms 31 that extend over the pins 28. The arms 31 are operated upon by rollers 32 located on the frame of the machine and so as to depress the pins 28v and consequently to force the cutter bar 21.

downi Compression springs 33 surround the pins 28 and cause the return of the pins 28 after the arms 31 have passed from beneath 'the rollers 32. By this arrangement ofthe cutter barwhen the edge of the knife is pointed downward.v

d there will be a quick downward movement A channel bar 34 coacts with the cutter bar 27 to sever the paper. The channel bar 34 is supported. in arms 35`that are located upon a shaft 36.- The shafts 30'and 36 are connected together by gear wheels 37 and 38 and so that when the cutter4 bar 27v is forced downward by the operation of the camrollers 32 the cutter bar will enter the channel bar 34. The channel 39 of the channel bar 34 is provided with sides 40 that incline inward, the top of the channel being narrower than the bottom of the channel. This permits the 'very Slight angular movement -of thecutter blade 27 with ref spect to the channel bar while the edge of the cutter blade-is within the channel.- This A, angular movement is performed while the ,.'cutter blade is entering and receding fromI the channel bar during the cutting opera- -member formed on the form; 2. It follows the edge to the folding means of themachine.

The folding means of the machine consists of a shoe 42, a shoelate 43 andv a movable folding bar 44. he shoe 42 is supported on an overhanging part of the frame 1. The shoe-plate 43 is bolted to the lower side of the shoe 42 and in proximity to the bed of the machine. The shoe-plate lies parallel to the bed ofthe machine and in proximity thereto 'but sufficiently distant therefrom to permit the movement "of the foldery bar, 44 beneath the plate and also to permit the bar to drag the end of the tubular member beneath the plate 43. The point 45` of the shoe is vlocated Aon the following-side, that is, it is located so as to receive the forward end of the tubular niember formed of the paper. The rod 14` follows the end of `the tubular member until it comes'in proximity to the point 45 of the shoe 42 whereupon the rod 46 is rotated so as to lift one side edge of the end of the tubular memberabove the toe of the shoe and to hold the other side edge below the plate 43. Further forward movement of the paper by the operation 'of the rollers 4 will cause the upper side edge to slide up onto the shoe and the lower side edge to pass beneath the plate 43. The instant that the sidey edges of the paper have been so guided that further proper movement of the ends ofthe sides' of the paper tube are secured, the rod 14 is withdrawn to avoid engagement with the folding bar 44. The folding bar 44 is located in apair of blocks 47 to which'mayybe connected a pair ot rollers48 that morefin side channel bars 49.

The channel bars 49 are secured to the frame 1 and extend along the sides of the machine. They extend upward-from the bed plate of the machine.' The blocks`47 are connected by links 50 toarms 51 which are secured to the 'shaft 52. Angularmovements of the arms'pl causes movement of the blocks .47 along the channel 53 of the channel bars 49 andv consequently causes theA folding bar 44 to move to and from and along the bedI plate ofjjthe machine.`

The channel bars'49 are so located that the folding barv 44 lis raised above the bed plate of the machine on the` following side Vof the shoe 42l and so as to permit the end of the paper tu/be to pass to the shoel 42.

During the time that the-folding bar 44 is thus held above the bed platel of the machine the end of the rod 14 passes beneath l' the folding bar `together'with the end of the papertube and the bar 14 is rotated so as to lift the upper side edge of the paper above the toeA or point o-f the shoe 42 and when the paper has been properly directed the bar 14 is rotated back and at the same time is withdrawn from the end of the paper tube and also from .beneath the folding bar 44- and the cutter bar 27. Immediately upon withdrawal of the endv of the bar 14 from beneath the folding bar 44 the arms 51 are swung forward to draw the folding bar beneath the plate 43. This engages .the upper side of the vpaper 60 near the end thereof so as to draw the end of the paper tube beneath the folding plate 43 and in so doing the upper side end por-y tion of the paper tube will be folded back on the body portion of the paper 60. Further operations are'performed in the formation of thebag, which, however, form no part of the invention presented in this application. Immediately upon the withdrawal of the end of the lrod 14 from beneath the cutter bar 27 the paper is severed and the severed portion passes .from beneath the shoe and folding plate to other parts of the machine that perform the o erations required to complete the bag. he end of the paper tube again advances while `the cutter bar 27 is raised and the folding bar 44 returns to its position behind the shoe 42, that is, on the following side of the shoe 42 -and to a point well above the bed of the machine. The operations thus ,repeat themselves, the end of the rod 14 folmeans. `In the, constructionshoivn the arm 51v 1s operatedl by a reciprocatory bar 54 which is operated by a cam wheel -55 hav' inga vcam v:slot 56 in which is located a roller 57fthat is yattached to the bar 54. 'Rotation of the cam wheel 55 causes oscillating movements of the armsy 51. The shaft- 52 may be operated by any suitable means Aso that rit will be properly timed with ref.

erence tothe .movements of the cutter bar 27 andy the rod 14.' It may be connected to the forming a tubular member, a means for A folding the end of the tubular member, a rotatable member for directing the side edges with reference to the folding means.

3. .Ina bag forming mechine, a shoe' for folding side edges of a tubular' member, a

' -rotatable member for directing the side edges of the endv of the tubular member to direct one side edge above the point of the shoe and the other side edge below the point of'the shoe.

4. In a bag making machine, a means for forming a tubular member, means for folding the'end of the tubular member, means for severing end portions of the tubular member, a rod extending through the tubular member, meansfor causing reciprocatory movements of the rod to cause the rod to follow the end of the tubular member to the folding means and beneath the severing means, and means located on the rod'to positively guide the side edges of thee'nd of the tubular member with reference to the folding means.

5.A In a bag making machine, forming a tubular member, a shoe for engaging the end of the tubular member for purposes of` folding the end of the tubular member, a rotatable rod having a flat end portion, means for causingreciprocatory movements of the rod to cause-the rod to.

follow the forward end vof the tubular member to the shoe and to rotate the rod to raise one side edge of the tubular member above the shoe point and to direct the lower side means forl yedge of the tubular member below the point of the shoe. I l

6. In a bag forming machine, a means for forming a tubular member, a shoe, .a folding bar, means for causing the folding bar to engagethe -end of the tubular member and ,pass of the tubular member, a rotatable rod having a flattenedV ortion at its end, means for reciprocating t e rod to cause the rodto follow the end edges of the tubular member beneath `the folding bar and to the point of the shoe and to rotate the bar to raise the upper side edge above the shoe and to direct the lower side edge beneath lthe shoe and to withdraw the rod from beneath the foldin bar.-

7 In al ag forming machine, a means for forming a tubular member, a shoe, a folding bar, means for causing the folding bar to engage the end of the tubular member beneath the shoe to, fold the end.

and pass beneath the shoe to fold the end of the tubular member, a severingmeans for severing end ortions of the tubular member, a rotatab e rod having a flattened portion at its end, means for reciprocating the rod to cause the rod to follow the end edges of the tubular member beneath the folding bar and to the point of the shoe and to rotate the rod to raise the .upper side edge above the shoe and to direct the lower side edge beneath the shoe and to withdraw the rod from beneath the folding bar, and from beneath the severing means.

8. In a bag formingmachine, means for forming a tubular member, Va shoe and a folding bar, means. for operating thefolding bar to engage theend ofthe upper side of the tubular member and to fold it back on the body portion of the tubular member, a severing means for severing the end portions of the tubular member, a rotatable rod having an end portion extending angularl away fromv the body portion of the ro means for causing reciprocatory movements of the rod to cause the end portion to follow the end edge of the tubular member to the shoe, the rod having a channel extending along the body portion of the rod and turned at the following end of the rod, a pin extending' into the channel for causing rotation of the rod wlien the end of the'rod comes in proXimityto the lpoint of the shoe. In testimony whereof we. have hereunto signed our names to this s ecication.

Louis H. ARTMAN. ,CARLy H. HARTMAN. 

